Method of joining wood pieces for making rolls



Julya, 192s; 1,615,387

W. J. SIMONDS ET AL METHOD 0F JOINING woon PIECES 'Fon MAKING ROLLS Filed Deo.14. 192s sneets-sheet 1 Ju'ly 3, 1928.

1,675,387 w. J. SIMONDS ET AL l METHOD oF JoINING woon PIECES Fon MAKING ROLLS 2 sheets-Sheet 2 Filed Dec. 14. 1926 Patented July 3, 192s. 1 .Y

UNITED STATES WARREN J. smonns ann JoHN e. eraan, or ORANGE, nassaui-answers, Assrenons PATENT OFFICE.

T RODNEY-HUNT MACHINE COMPANY, OF GRANGE,v MASSACHUSETTS, A `COR- PORATION 0F MASSACHUSETTS.

METHOD or JoiNINe Woon Pinces ron MAKING ROLLS.,

pplication filed December 14, 1926. Serial No. 1,2.

This invention relates to the manufacture of solid wood rolls for various uses in the textile and alliedindustries.

y `The principal objects ofthe invention are to provide a method of joining end to end,Y two or more blocks or discs ofwood so that they will be permanently united with eachf other and can be treated and used as if the roll were made of a single integral piece; 101:0 provide a construction in whichv the union of the pieces of wood can be effected in a. simple manner without leaving any detrimental joint; to provide means for prevent ing the access o moisture Ato the shaft inside or the sulphur com ound used therein, but principally to provide for the use for solid `rolls of shorter `lengths of wood than can be used under present conditions, as well as toprovide for the production of a" roll without so many imperfections like knots, bark seams,` and other hidden blemishes which have been unavoidable when made of solid logs,`thus avoiding patching and even the discarding of whole logs.

y Other objects and advantages of the invent-ion will appear hereinafter.

Reference is to be hadto the accompany ing drawings in which Fig. l is a side view of the roll constructed of three discs or short pieces of Wood in accordance with this invention; o

Fig. 2 is a similar view, showingthe roll at one stagein its manufacture;

Fig. 3 is a longitudinal sectional view of a modification showing the position of the parts before two pieces are "united; Fig. 4 is an end view of one of these pieces showingr the fastening means in section: and y v Fig. 5 is a side view of a roll made in this way. y

Rolls for textile, paper and other indus! Vtries formed of wood are presenting'a more diflicult problemas the supply of large logs become more` limited. This invention is made for the purpose of providing for the "makingr up of such ,rollsof shorter sections'` but of full diameter. Great wastage has been unavoidable heretofore in making the solid log rolls owing to the fact that barkseams and other hidden blemishes in the logs necessitatepatching and in cases in which these are serious, the discarding of the whole lop,r for this purpose after it has pended upon it in finishing it.

Figs. 1 and 2 show a preferred embodi` ment of this invention, in which a: series of discs or pieces of wood 10 and l1 are used. They are shown of two different lengths to illustrate the fact that a roll can be made up of suchpieces `irrespective of the lengths of the individual ones. The roll is shown in Fig. f2 ina condition in which it is semifinished and ready to be put into a lathe and turned up to uniform diameter. In the first place these different sections or `discs are designed to be placed together end to end with the grain running longitudinally of the roll. The sections ofthe log are first sawed off. Of course it is impossible to saw such pieces so that they will be of uniform tliickness,b1it they are assembled on the shaft 2O as indicated in Fig. 2. The discs are counterbored, as for example, with a. six inch groove at 2l on each end of the dises between the end discs and on the inner ends of the end discs, and are provided with al tapered eounterbore 22 extending from the i Vdiameter to insure a very tight fit of `a length 14 of six" inch pipe which is to be usedto unite two of the sections by forcing it into the two registering recesses.` These parts are preliminarily assembled on the shaft 20, as shown invFig. 2, withthe pieces 14 partially forced into each end `of -the several discs, but leaving spaces between the several discs. i

Before the discs are forced entirely togetherfas shown in Fig. 1. the spaces 30 between the `suri'aces 23 not being perfectly uniform, this partly assembled roll is put into; a lathe and aturning tool 26 with cutting? edges on both sides is moved into this space while the shaft is turned. This smooths off the surfaces Q3 uniformly on both sides and insures the clearance. that is.

the space 30 between two of these surfaces yto be absolutely uniform all around the roll.

e essential.

As the surfaces 23 extend only part way in from the circumference, that is, until they encounter the conical inclined surface 22, it is not necessary to go in with the tool any further than to be suie to straighten up the surfaces Q3. This insures a perfectly uniform fit completely around the disc.

Now the roll is put into a hydraulic press and the parts forced together under high pressure. It will be obvious that the joints between the surfaces 23 will iit absolutely and that the pressure will force the pipes 14, in the direction of the grain, into the two adjacent discs and hold the discs together firmly at the center as well as guide the same. These pipes also have the effect of protecting the shaft, or any iilling that may be put in around the sha-ft, from the passage of water or other liquid through the joints at the surfaces 9.3. A ypermanent joint is assured by putting through the liolding'bolts 27 while the sections are still under pressure in the press. These also are put through the metal end plates 28 which are provided with flanges 29 forced into the roll in the direction ofthe grain under the pressure of the press.r while all the rest of the work is being accomplished.

' After the nuts are screwed on the through bolts 27 the whole device is held permanently under the pressure given it by the hydraulic press. It is then in the form Vshown in Fig. 1 and is put into a lathe again and turned down to a uniform surface. It can be turned down over and over again as its surface suffers from wear, almost down to the through bolts Q7 and flanges 29. This provides a permanent construction in which the joints are absolutely tight.

These rolls are used in paper mills and in the textile industry as is well understood. On the average. a roll constructed in this way has a better surface than one made of a single log and it will hold up better and not be so liable'to warp.

A similar way of achieving some of these results also constitutes part of this invention. -In the second sheet of drawings, I have shown the invention in a simpler form as being applied to the joining of two blocks or discs 10 and 11 of wood. When uniting two pieces7 such as those shown or any other pieces. a series of steel or iron tubes 12 are driven with the. grain about one-half way into one of the sections 10 as indicated in Fig. 3.V These may be arranged in any desired way, preferably around the center and spaced equally apart, although this is not Furthermore the ends of these tubes are chamfered on the inside. I lfind that assists in guiding the tube'in the assembling process and that the end of the tube tends to follow the grain of the wood better than if the tubes were left square at their ends. The thin edge tends to expand,

thus more firmly holding it in position. This produces a desirable locking element when the tubes are arranged symmetrically around the center and insures the locking of the two pieces of wood together permanently.

It will be noticed also that I have shown the central tube 14 chamfered at its ends as indicated at l5. The two ieces of wood can be secured together efficiently if a plu rality of the tubes 12 are arranged at approximately equaldistances from the central tube. Also in some cases the central tube 14 is all that is required to hold the block tofrether. For additional strength I can combine both methods and this is what is shown in thesetigures.

The tube 14 at the. center seals the joint between the two pieces of wood 10 and 11 so that a sulphur compound placed around the shaft will never leak out beyond the inner part of this tube.. The sulphur therefore is sealed by this inner tube and all leakage to and from it is prevented.

The next step of the process consists in driving these two blocks together so as to embed the tubes in both blocks. This is done under a pressure of upwards of 75 tons. They extend far enough into each one to prevent lateral motion. Being driven in frictionally, they resist any efforts at separating the parts by pulling them apart. Y

At the present time many of these rolls are made of a single piece of log which on account of its size cannot be treated by any of the standard methods of preserving wood. Substitutes therefore have to be employed which are far from complete. Now by using a plurality of separate blocks or discs. each of them can be treated conveniently in the most approved methods of preserving and a rollof large dimensions can finally be obtained which is suiciently subjected to the preservatives. It will be understood also that` by making up a roll of several discs, a carefuly selection of individual ones can be made so that the finished surface ofv the complete roll may be provided without knots or other blemishes. This is important because logs of high quality are growing more scarce every year and some wood rolls in the trade are required to have a substantially perfect surface. In this way we can utilize small ends of wood which would otherwise be Wasted as far as use for rolls is concerned. The roll when `completed is treated exactly like a single piece of Wood and trimmed down to size as may be desired. i 1 y It will be understood, of course, that we prefer to use the method shown in Figs. 1 and 2 ofthe drawings. The two sets of tubes 12 and 14 can be used with that method or We can use either one exclusive of the other, without departing from the scope of this invention. Although we have der pressure.

described only two examples of the 'method and two forms of the uniting means, we are aware of the fact that other modifications can be made therein by any person skilled in the art Without departing from the scope of the invention as expressed in the claims. Thereforewe do not Wish to be limited to all the details of construction herein shown and described, but what we do claim is `1. The method ofmaking up Wood rolls out of a plurality of Wood discs, which consists in assembling a series of these discs on a shaft with the grain all running parallel to the shaft, leaving the discs all spaced apart, squaring up each two adjacent end surfaces simultaneously, forcing the discs together on the shaft, and uniting them un- 2. The method of making wood rolls of a plurality of pieces, which consists in cutting a series of discs with the grain all running in an axial direction, shaping the discs on the ends so that when placed end to end they will contact only at the edges, boring they discs centrally, centering them onA a shaft or arbor, spaced apart, placing the shaft or arbor on a lathe, cutting inwardly to true up the edges of the discs at opposite sides of said spaces, and then forcing the discs together and uniting them, whereby a roll will be formed with thesurfaces of the discs in Contact with veach other and With true joints between them. l

3. The method of making up wood rolls out of a plurality of Wood discs, which consists in cuttingthe discs with end surfaces fiat at the edge with a central counter-bore and a surface slanting inwardly from the flat surface to the counterbore, assembling a series of these discs on a shaft with the grain all running parallel to the shaft, leaving the discs all spaced apart, squaring up said flat surfaces, forcing them together on the shaft, and uniting them under pressure.

4. The method of making up wooden rolls out of a plurality of pieces of wood. which consists in assembling a'series of. discs on an arbor or shaft with longitudinal metal pieces of short length between the discs to hold them together, but with the discs spaced apart on the arbor, turning the edges lof the discs at their outer surfaces to true fitting surfaces, Aforcing the discs together on the arbor under heavy pressure to force the metal pieces into the several discs and bring the true edges into perfect Contact all around, fastening the discs together by through bolts to hold them under the pressure, and then turning off the exterior of the roll to a uniform surface.

5.As an article of manufacture, a Wood roll for textile and paper machines made up of a series -of wood discs arranged with the grain running in the same direction and fitting each other perfectly all around so as to form perfect joints at their' adjacent surfaces, pipes between each pair of adjacent j ones projecting into the discs to hold them firmly together and protect the joint, a shaft running through the roll from end to end, and a gudgeon on each end of the shaft driven into the roll to hold the same.

6. As an article of manufacture, ak Wood roll made up of a series of Wood discs arranged vvith the grain running in the same direction and fitting each other all around so as to formv perfect joints at their adjacent surfaces, pipes between each pair of adjacent discs projecting into the discs to hold them firmly together and protect the joint, a shaft running through the roll from end to end, a gudgeon at each end of the shaft driven into the roll to hold the same, a metal plate on each end of the roll having a flange projectingl into the roll, and through bolts extending from one plate to the other for securing the' different pieces of wood together' into a single roll.

7. A wooden roll made up of a plurality of solid Wood discs all squared off at their ends and placed end to end with the grain of the same continuous from one cud of the roll to the other, a shaft extending through the whole roll. and a metallic tube centered about the shaft and larger than the shaft for joiningthe discs together and sealing the joint.

In testimony whereof We have hereunto affixed our signatures. 1 

